I used to use Aperture but switched to Lightroom a while back. I now would like to migrate all of the photos in my Aperture library to Lightroom. However, I don't have Aperture on my computer anymore and I am running El Capitan.
I know that Lightroom has a plugin for importing Aperture libraries, but when I tried to use it I got this error message:
The importer plug-in supports libraries maintained with Aperture 3.5.1 and later. An older library is currently selected. Please note that errors may be encountered if you proceed.
What is the best way to get the photos (with edits) out of Aperture and into Lightroom?
I would suggest you to continue the process and ignore the error , you can refer the below link for screen shots steps.